Quiz about Changes in Force and Motion

Question 1

A person pushes against a wall with 15N of force. The wall doesn't move. The wall exerts how much force on the student?

Accepted Answer

15N

Answer

greater than 15N

Answer

less than 15N

Answer

0N

Question 2

What would cause the person on the left to change position?

Accepted Answer

The force applied by the two people on the right would have to be greater than 200N.

Answer

the force applied by the two people on the right would have to be less than 200 N.

Answer

The person on the left would need to turn around

Answer

It is impossible

Question 3

In what direction with the box move?

Accepted Answer

left

Answer

right

Answer

up

Answer

down

Question 4

What is the net force acting on the box?

Accepted Answer

5N

Answer

25N

Answer

15N

Answer

0N

Question 5

There is a book sitting at rest on a chair. Which of the following is true?

Accepted Answer

There are many forces acting on the book, but they balance each other out

Answer

The book exerts no force on the chair

Answer

The chair exerts no force on the book

Answer

all of these

Question 6

Three people can move a piano easier than two people. This demonstrates which of Newton's Laws of Motion?

Accepted Answer

Newton's 2nd Law (F= m x a)

Answer

Newton's 1st Law (Inertia)

Answer

Newton's 3rd Law (Action Forces & Reaction Forces)

Question 7

What is the speed of an object in a given direction?

Accepted Answer

velocity

Answer

force

Answer

speed

Answer

motion

Question 8

A push or pull that can change the motion of an object

Accepted Answer

force

Answer

motion

Answer

direction

Answer

mass

Question 9

The sum of all the forces acting on an object

Accepted Answer

net force

Answer

motion

Answer

force

Answer

mass

Question 10

A change in motion caused by an unbalanced force acting on an object; can include increasing speed, decreasing speed, or changing direction

Accepted Answer

acceleration

Answer

speed

Answer

motion

Answer

velocity

Question 11

What is the net force on the box shown in the picture?

Accepted Answer

10 N to the left

Answer

10 N to the right

Answer

60 N to the left

Answer

50 N to the right

Question 12

A change to an object's motion is caused by . . .

Accepted Answer

Unbalanced forces

Answer

Balanced forces

Answer

Acceleration

Answer

Velocity

Question 13

If these boys are pulling with the same amount of force.  What will happen?

Accepted Answer

They will not move at all.

Answer

The boy in blue will win.

Answer

The boy in red will win.

Answer

Both will fall down.

Question 14

What happens when two forces act in the same direction?

Accepted Answer

Their strengths are added.

Answer

They cancel each other out.

Answer

The stronger one prevails.

Answer

Their sum divided by the two is the total force.

Question 15

Any time the forces are unbalanced, an object will remain at rest. True or false?

Accepted Answer

false

Answer

true

Question 16

Which of the following objects has the least acceleration?

Accepted Answer

d. a full shopping cart pushed with a light
force

Answer

a. an empty shopping cart pushed with a hard force

Answer

b. a full shopping cart pushed with a hard force

Answer

c. an empty shopping cart pushed with a light force

Question 17

The illustration shows the forces in Newtons (N) acting on three different blocks. Which boxes will move under these conditions?

Accepted Answer

Blocks 2 and 3

Answer

Blocks 1 and 2

Answer

Blocks 1 and 3

Answer

Blocks 1,2, and 3

Question 18

Students are investigating how mass affects the force needed to move an object. They attached a wooden block to a spring scale and placed a 10 g mass on top of the block and pulled it 50 cm across the table.What change(s) to their set-up would result in a larger force reading on the spring scale?

Accepted Answer

Changing the mass to a larger amount.

Answer

Changing the mass to a smaller amount

Answer

Pulling the block 10cm across the table

Answer

Using a different scale

Question 19

The property of matter that states that an object at rest stays at rest and an object in motion stays in motion unless acted on by an outside force.

Accepted Answer

inertia

Answer

reference frame

Answer

newton

Answer

friction

Changes in Force and Motion

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